| 释义 |
▪ I. ˈthinning, vbl. n.
[f. thin v.1 + -ing1.]
a. The action of thin v.1, in various senses; reduction or decrease in thickness, closeness, number, density, etc. Also with out, off, away, up, etc. spec. in Forestry, removal of some of the trees in an immature stand, or removal of part of the crown of an individual tree. Also attrib.
c1000Sax. Leechd. II. 260 Læcedomas þa þe þynnunge mæᵹen hæbben. 1398Trevisa Barth. De P.R. xix. xi. (Bodl. MS.), White mater is igendred of thynnynge and spredinge of aier. 1799J. Robertson Agric. Perth 257 Weeded down by various thinnings. 1800W. Pontey Profitable Planter 33 It is not to be wondered at, if, even before thinning, the soil should be nearly exhausted, and the trees checked in their growth. 1822J. C. Loudon Encycl. Gardening iii. iii. 1108 Autumn, or very early in spring, are the proper seasons for thinning where the trees are to be taken up by the root and replanted elsewhere. 1839Ure Dict. Arts 1269 The thinning up, or quantity of turpentine required to bring it to its proper consistence. 1851Carpenter Man. Phys. (ed. 2) 268 By the thinning-away of its wall at its most projecting part. 1868Rep. U.S. Commissioner Agric. (1869) 423 Upon thinning out, enough plants were cast away to have run at least twelve rows additional. 1880,1922[see coppicing vbl. n. b]. 1970H. L. Edlin Collins Guide to Tree Planting & Cultivation xi. 170 The thinning cycle, or interval of years between thinnings, can be short..or long. Ibid., In regular thinnings a definite proportion of the growing stock of trees is taken out.
b. concr. usually pl. That which is removed in the process of thinning. (Cf. sweepings.)
1771Usef. Proj. in Ann. Reg. 115/2 Sir John..never receives less than a guinea an acre in thinnings throughout his plantations. 1805R. W. Dickson Pract. Agric. I. Pl. xxx. 110 A fir paling of the horizontal kind, made from the thinning of trees of that kind. 1893Jrnl. R. Agric. Soc. Dec. 826 Thinnings and rubbish should be immediately removed and burnt.
▪ II. ˈthinning, ppl. a.
[f. thin v.1 + -ing2.]
That thins, in various senses of the verb.
1550Bale Eng. Votaries ii. 81 To confirme the thynynge shewe of hypocresye. 1790Wolcott (P. Pindar) Rowland for Oliver 92 Art thou a Doctor? Yes, of thinning skill. 1888Pump Court 31 Oct. 5/2 His gradually thinning hair. 1899Mackail Life Morris II. 154 A mere thinning remnant between two divergent and increasing camps. |
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